EP1768418A3 - Improved block transform and quantization for image and video coding - Google Patents

Improved block transform and quantization for image and video coding Download PDF

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Publication number
EP1768418A3
EP1768418A3 EP20060020297 EP06020297A EP1768418A3 EP 1768418 A3 EP1768418 A3 EP 1768418A3 EP 20060020297 EP20060020297 EP 20060020297 EP 06020297 A EP06020297 A EP 06020297A EP 1768418 A3 EP1768418 A3 EP 1768418A3
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EP
European Patent Office
Prior art keywords
transformation
quantization
decoding
encoding
image
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP20060020297
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German (de)
French (fr)
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EP1768418A2 (en
EP1768418B1 (en
Inventor
Henrique S. Malvar
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Microsoft Technology Licensing LLC
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Microsoft Corp
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Publication of EP1768418A2 publication Critical patent/EP1768418A2/en
Publication of EP1768418A3 publication Critical patent/EP1768418A3/en
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Publication of EP1768418B1 publication Critical patent/EP1768418B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F17/00—Digital computing or data processing equipment or methods, specially adapted for specific functions
    • G06F17/10—Complex mathematical operations
    • G06F17/14—Fourier, Walsh or analogous domain transformations, e.g. Laplace, Hilbert, Karhunen-Loeve, transforms
    • G06F17/147—Discrete orthonormal transforms, e.g. discrete cosine transform, discrete sine transform, and variations therefrom, e.g. modified discrete cosine transform, integer transforms approximating the discrete cosine transform
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N19/00—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals
    • H04N19/42—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals characterised by implementation details or hardware specially adapted for video compression or decompression, e.g. dedicated software implementation
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N19/00—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals
    • H04N19/10—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using adaptive coding
    • H04N19/102—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using adaptive coding characterised by the element, parameter or selection affected or controlled by the adaptive coding
    • H04N19/124—Quantisation
    • H04N19/126—Details of normalisation or weighting functions, e.g. normalisation matrices or variable uniform quantisers
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N19/00—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals
    • H04N19/60—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using transform coding
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N19/00—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals
    • H04N19/60—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using transform coding
    • H04N19/61—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using transform coding in combination with predictive coding

Abstract

An improved method and block transform for image or video encoding and decoding, wherein transformation and inverse transformation matrixes are defined such that computational complexity is significantly reduced when encoding and decoding. For example, in the two-dimensional inverse transformation of de-quantized transform coefficients into output pixel information during decoding, only four additions plus one shift operation are needed, per co-efficient transformation, all in sixteen-bit arithmetic. Transformations provide correct results because quantization during encoding and de-quantization (sixteen bit) during decoding, via the use of one of three tables selected based on each coefficient's position, have parameter values that already compensate for factors of other transformation multiplications, except for those of a power of two, (e.g., two or one-half), which are performed by a shift operation during the transformation and inverse transformation processes. Computational complexity is significantly reduced with respect to other known transforms without adversely impacting compression or quality.
EP06020297.5A 2001-09-18 2002-08-27 Improved block transform and quantization for image and video coding Expired - Lifetime EP1768418B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US09/955,577 US6882685B2 (en) 2001-09-18 2001-09-18 Block transform and quantization for image and video coding
EP02019057.5A EP1294198B1 (en) 2001-09-18 2002-08-27 Improved block transform and quantization for image and video coding

Related Parent Applications (3)

Application Number Title Priority Date Filing Date
EP02019057.5 Division 2002-08-27
EP02019057.5A Division EP1294198B1 (en) 2001-09-18 2002-08-27 Improved block transform and quantization for image and video coding
EP02019057.5A Division-Into EP1294198B1 (en) 2001-09-18 2002-08-27 Improved block transform and quantization for image and video coding

Publications (3)

Publication Number Publication Date
EP1768418A2 EP1768418A2 (en) 2007-03-28
EP1768418A3 true EP1768418A3 (en) 2011-02-02
EP1768418B1 EP1768418B1 (en) 2017-03-29

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EP06020298.3A Expired - Lifetime EP1750450B1 (en) 2001-09-18 2002-08-27 Improved block transform and quantization for image and video coding
EP02019057.5A Expired - Lifetime EP1294198B1 (en) 2001-09-18 2002-08-27 Improved block transform and quantization for image and video coding
EP06020297.5A Expired - Lifetime EP1768418B1 (en) 2001-09-18 2002-08-27 Improved block transform and quantization for image and video coding
EP06020296.7A Expired - Lifetime EP1750449B1 (en) 2001-09-18 2002-08-27 Improved block transform and quantization for image and video coding

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EP06020298.3A Expired - Lifetime EP1750450B1 (en) 2001-09-18 2002-08-27 Improved block transform and quantization for image and video coding
EP02019057.5A Expired - Lifetime EP1294198B1 (en) 2001-09-18 2002-08-27 Improved block transform and quantization for image and video coding

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EP06020296.7A Expired - Lifetime EP1750449B1 (en) 2001-09-18 2002-08-27 Improved block transform and quantization for image and video coding

Country Status (9)

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US (6) US6882685B2 (en)
EP (4) EP1750450B1 (en)
JP (5) JP3964765B2 (en)
KR (4) KR100839311B1 (en)
CN (4) CN1231068C (en)
DE (1) DE20222025U1 (en)
ES (4) ES2628527T3 (en)
HK (1) HK1053033B (en)
TW (1) TWI221388B (en)

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